Home / 20,809.50-31,214.31-5,227.12

Finding the Fourth Proportional to 20,809.50, 31,214.31 and 5,227.12

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Solution

The fourth proportional to 20,809.50, 31,214.31 and 5,227.12 is: 7,840.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,809.50 : 31,214.31 = 5,227.12 : x
  2. Step 2: Convert to fraction form
    20,809.50/31,214.31 = 5,227.12/x
  3. Step 3: Cross multiply
    20,809.50x = 31,214.31 × 5,227.12
  4. Step 4: Simplify right side
    20,809.50x = 163,160,944.09
  5. Step 5: Solve for x
    x = 163,160,944.09/20,809.50
  6. Step 6: Final answer
    x = 7,840.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.